Rack



FIG. 1 is a perspective view of the rack;

FIG. 2 is a front elevational view of the rack, the back side of which is identical;

FIG. 3 is a left side elevational view of the rack;

FIG. 4 is a right side elevational view of the rack;

FIG. 5 is a top plan view of the rack; and,

FIG. 6 is a bottom plan view of the rack. 

CLAIM The ornamental design for a rack, as shown and described. 